MHTCET 2016 Math Solved Paper

(c) (a) x2 - x = 0 ⇒ x(x- 1) = 0
⇒ x - 0 and x = 1,
This represent a pair of lines.
(b) xy - x = 0 ⇒ x (y - 1) = 0
⇒ x = 0, y = 1,
This represent a pair of lines.
(c ) y2 - x + 1 = 0
⇒ y2 = ( x - 1 ) .
This represent a parabola.
Which does not represent a pair of lines
(d) xy + x + y + 1 = 0⇒ x(y +1) + (y +1) = 0 ⇒ (y +1)(x + 1) = 0
⇒ y = - 1 and x = 1
This represent a pair of lines